This first monograph on the influential underground conceptual and sound artist features essays by Mike Kelley, Paul McCarthy, Cosey Fanni Tutti and others. It spans from Duncan's early days making performance-based work in Los Angeles in the late 1970s to his years in Japan and Amsterdam, where he focused on experimental sound, film and radio work, and continues to the mature multimedia installations and performances he is currently making in Italy. Investigative and probing, Duncan's work has always been at the forefront of experimental culture, encompassing noise music and extreme physical experience, often rendered in surprisingly beautiful ways. Duncan's art has the ability to enthrall and terrify, and this book documents all of his most important projects, creating a critical and intimate portrait of the artist and his uncompromising work.